About This Tool
This Base64 encoder/decoder helps you convert text to Base64 encoding or decode Base64 strings back to text instantly. Base64 is commonly used for encoding binary data, email attachments, and data URLs.
Base64 Encoder & Decoder
Input
Output
How to Use
- Choose the "Encode" tab to convert text to Base64, or "Decode" tab to convert Base64 to text
- Paste your text or Base64 string into the input text area
- Click "Convert" to perform the encoding or decoding
- Use "Copy to Clipboard" to copy the result
- Click "Clear" to reset both input and output fields
Common Uses:
- Data URLs: Embed images and files directly in HTML/CSS using Base64
- API Authentication: Encode credentials for Basic Authentication headers
- Email Attachments: Encode binary data for email transmission
- Data Transfer: Safely transmit binary data over text-only protocols
- Configuration Files: Store encoded data in configuration files and environment variables
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used to encode data that needs to be transmitted over media designed to handle text, ensuring data remains intact during transport.
When should I use Base64 encoding?
Use Base64 when you need to encode binary data for transmission over text-based protocols like HTTP headers, JSON, or XML. It's also useful for embedding images in CSS/HTML, storing binary data in databases, and API authentication.
Does Base64 encrypt my data?
No, Base64 is encoding, not encryption. Anyone can easily decode Base64 strings back to the original data. Never use Base64 as a security measure - use proper encryption algorithms for sensitive data.
Is my data sent to a server?
No. All Base64 encoding and decoding happens locally in your browser using JavaScript. Your data never leaves your device and is not stored or transmitted anywhere.
Why does Base64 increase data size?
Base64 encoding increases data size by approximately 33% because it converts every 3 bytes of binary data into 4 ASCII characters. This overhead is the trade-off for making binary data safe for text-based transmission.